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Convertissez des images entre les formats WEBP, JPG, PNG, GIF et BMP en ligne gratuitement. Aucun upload requis. Cet outil en ligne gratuit ne nécessite ni inscription ni installation de logiciel. Ouvrez-le simplement dans votre navigateur et commencez à l'utiliser immédiatement. Les résultats sont traités rapidement et en toute sécurité, toutes les données étant gérées directement sur votre appareil.

Convertisseur d'images

Convertissez des images entre les formats WEBP, JPG, PNG, GIF et BMP en ligne gratuitement. Aucun upload requis.

Comment utiliser Convertisseur d'images

1

Upload Images

Drag and drop or click to select one or more images. Supports PNG, JPG, WEBP, GIF, and BMP.

2

Choose Format & Settings

Select output format (PNG, JPG, or WEBP). Adjust quality and resize percentage if needed.

3

Convert Automatically

Images are converted instantly in your browser with a progress indicator for each file.

4

Download Results

Download each image individually, or use "Download All" to get a ZIP file with all conversions.

Quand utiliser?

Website Optimization

Convert images to WEBP to reduce file size and improve website loading speed.

Batch Conversion

Process multiple photos at once — ideal for converting iPhone HEIC screenshots or camera exports.

Email & Sharing

Convert PNG to JPG to shrink file size before attaching to emails or social media uploads.

Design Assets

Convert logos or graphics to PNG with transparency support for design projects.

Informations détaillées

How Image Conversion Works

All conversions happen locally in your browser using HTML5 Canvas. No images are uploaded to any server. Supported formats: PNG (lossless), JPG (adjustable quality), WEBP (modern compression). Resize reduces dimensions proportionally.

Questions fréquentes

A: Yes. You can upload multiple images simultaneously. Each file is converted independently, and you can download them all as a ZIP archive.

A: No. All processing happens entirely in your browser using JavaScript Canvas. Your images never leave your device.

A: Input: PNG, JPG, WEBP, GIF, BMP. Output: PNG, JPG, WEBP.

A: PNG uses lossless compression (no quality loss). JPG and WEBP allow you to adjust quality with the slider. Lower quality = smaller file size.